engine build

[Evil_Genious13]

has anyone on here ever built an 80cc from "scratch?" I've been thinking about going this route instead of buying a kit largely to enhance my knowledge of these engines, plus the added challenge. Will any of these parts bolt up together or is there certain things i should look for. any input/advice is greatly appreciated.

 

[KCvale]

has anyone on here ever built an 80cc from "scratch?"

Yes, and there is no such thing as an 80cc.

gasbike had unassembled 66cc engines for $99 so I got a couple.
This all they had for instructions.



It leaves out things like keyways and the seals but you get the idea.

 

[Evil_Genious13]

ok can you explain what the 66/80cc means?

 

[Timbone]

That is not a good way to start...

Lots of info. Read, read, read.

=Timbone=

 

[Evil_Genious13]

im not exactly a beginner to these builts. just never built a motor start to finish, always been a kit. where should i start?

 

[KCvale]

CC's is cubic centimeters, the volume in a cylinder.
It is calculated by Bore x Stroke.
The engine is 66cc.

80cc is some long ago Chinese measure that adds other BS in and only used as a making trick to make an engine sound bigger.

gasbike has this to build your own engine.
http://www.gasbike.net/66cc-racing-engine-build.html
It's pretty much all the piece at 55% off what you would pay for them individually.